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Finding the Fourth Proportional to 67.79, 93.61 and 47.13

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Solution

The fourth proportional to 67.79, 93.61 and 47.13 is: 65.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    67.79 : 93.61 = 47.13 : x
  2. Step 2: Convert to fraction form
    67.79/93.61 = 47.13/x
  3. Step 3: Cross multiply
    67.79x = 93.61 × 47.13
  4. Step 4: Simplify right side
    67.79x = 4,411.81
  5. Step 5: Solve for x
    x = 4,411.81/67.79
  6. Step 6: Final answer
    x = 65.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.